From d0b7069d1c4416f5163a978822cb206281cb82c1 Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Fri, 4 Dec 2020 16:37:02 +0000
Subject: Issue #1694 - Part 1: Use scriptabledateformat for the Cookie Accept
 dialog.

---
 .../cookie/content/cookieAcceptDialog.js           | 30 +++++++++++++++++-----
 .../chrome/cookie/cookieAcceptDialog.properties    |  2 ++
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/toolkit/components/cookie/content/cookieAcceptDialog.js b/toolkit/components/cookie/content/cookieAcceptDialog.js
index 4b322e95d9..5f5760305a 100644
--- a/toolkit/components/cookie/content/cookieAcceptDialog.js
+++ b/toolkit/components/cookie/content/cookieAcceptDialog.js
@@ -13,6 +13,7 @@ Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
 
 var params;
 var cookieBundle;
+var gDateService = null;
 
 var showDetails = "";
 var hideDetails = "";
@@ -38,6 +39,14 @@ function onload()
   document.getElementById("cancel").setAttribute("icon", "cancel");
   document.getElementById("disclosureButton").setAttribute("icon", "properties");
 
+  // Initialize the date formatter
+  if (!gDateService) {
+    const nsScriptableDateFormat_CONTRACTID = "@mozilla.org/intl/scriptabledateformat;1";
+    const nsIScriptableDateFormat = Components.interfaces.nsIScriptableDateFormat;
+    gDateService = Components.classes[nsScriptableDateFormat_CONTRACTID]
+                             .getService(nsIScriptableDateFormat);
+  }
+
   cookieBundle = document.getElementById("cookieBundle");
 
   // cache strings
@@ -174,12 +183,21 @@ function cookieDeny()
 function GetExpiresString(secondsUntilExpires) {
   if (secondsUntilExpires) {
     var date = new Date(1000*secondsUntilExpires);
-    const locale = Components.classes["@mozilla.org/chrome/chrome-registry;1"]
-                   .getService(Components.interfaces.nsIXULChromeRegistry)
-                   .getSelectedLocale("global", true);
-    const dtOptions = { year: 'numeric', month: 'long', day: 'numeric',
-                        hour: 'numeric', minute: 'numeric', second: 'numeric' };
-    return date.toLocaleString(locale, dtOptions);
+
+    // if a server manages to set a really long-lived cookie, the dateservice
+    // can't cope with it properly, so we'll return a descriptive string instead.
+    var expiry = "";
+    try {
+      expiry = gDateService.FormatDateTime("", gDateService.dateFormatLong,
+                                           gDateService.timeFormatSeconds,
+                                           date.getFullYear(), date.getMonth()+1,
+                                           date.getDate(), date.getHours(),
+                                           date.getMinutes(), date.getSeconds());
+    } catch (ex) {
+      // Expiry duration was out of range for the date formatter, meaning a silly long time.
+      expiry = cookieBundle.getString("expireInAVeryLongTime");
+    }
+    return expiry;
   }
   return cookieBundle.getString("expireAtEndOfSession");
 }
diff --git a/toolkit/locales/en-US/chrome/cookie/cookieAcceptDialog.properties b/toolkit/locales/en-US/chrome/cookie/cookieAcceptDialog.properties
index bba1214986..698c6f010d 100644
--- a/toolkit/locales/en-US/chrome/cookie/cookieAcceptDialog.properties
+++ b/toolkit/locales/en-US/chrome/cookie/cookieAcceptDialog.properties
@@ -7,6 +7,8 @@ domainColon=Domain:
 forSecureOnly=Encrypted connections only
 forAnyConnection=Any type of connection
 expireAtEndOfSession=At end of session
+#  LOCALIZATION NOTE (expireInAVeryLongTime) This string is used if a cookie won't expire for a literal life age and then some.
+expireInAVeryLongTime=Not in your lifetime
 
 showDetails=Show Details
 hideDetails=Hide Details
-- 
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